Acarnival charges $1.50 per ride after an entrance fee. you paid a total of $30
after 12 rides. (a)write an equation that gives the total cost as a function of the
number of rides. (b) find the total cost for 19 rides.

I didn't really understand but I hope this helps sorry if it doesn't!!

Step-by-step explanation:

r = number of rides

1.50r

1.50×12=18

1.50×19=28.50

12 rides = $18

19 rides = $28.50

and if you need the entrance fee:

30-18=12

so it would probably be $12.

and for the total ig fo the last one it would be:

28.50+12=40.50

so $40.50

Again I didn't really understand the question but I hope this helps!!

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752